Middle Atlantic 50PC HP Master Pack - HPMP

Middle Atlantic HPMP 10-32 Truss Head Rack Screws — 50-Pack

Overview

The Middle Atlantic HPMP is a 50-piece master pack of 10-32 Phillips-drive truss head rack screws in a black finish — the standard fastener for securing rack-mount equipment to rack enclosures and open-frame rails with 10-32 tapped holes. If your facility runs predominantly 10-32 railed Middle Atlantic racks, stocking the HPMP means you have enough hardware on hand to fully populate multiple units without hunting for individual screws mid-installation.

At 0.75 inches in length, these screws seat flush against rack rails without bottoming out in shallow-threaded equipment ears — a common problem when field techs substitute longer hardware from a parts bin. The truss head profile provides a wider bearing surface than a standard pan head, which distributes clamping load across the equipment ear and reduces the chance of wallowing out thin-gauge faceplate holes on lighter gear.

Key Features

• 10-32 Thread Pattern: matches the most common tapped-hole standard in North American commercial rack installations. If your network rack or AV rack uses 10-32 rails — the default on most Middle Atlantic, Belden, and comparable enclosures — these drop right in with no thread-chasing or adapter hardware.
• 0.75-Inch Length: sized to engage the full depth of a standard 10-32 tapped rail while leaving clearance behind. Longer screws risk interference with cable runs or rear accessories; shorter screws may strip under repeated service cycles. 0.75 in. is the field-proven length for this application.
• Phillips Drive Style: works with the #2 Phillips bits already in every installer's pouch. No specialty bits required, which matters when you are pulling wire overhead or working in a tight two-post relay rack.
• Truss Head Profile: the wider, low-profile head seats cleanly over standard rack equipment ears and cover panels, distributing clamping force to reduce faceplate distortion on thinner-gauge enclosures and blanks.
• Black Finish: matches the interior of black rack enclosures for a clean finished look — relevant when rack doors are left open in client-facing installations such as AV equipment rooms, security head-end closets, or structured cabling termination points.
• 50-Count Master Pack: enough hardware to mount 12–16 standard 1U or 2U devices with screws to spare for re-work and future expansion. Buying by the master pack cuts per-unit cost versus single-sleeve quantities and keeps your van or staging bench stocked for multi-rack jobs.

Integration & Compatibility

The HPMP is compatible with any rack enclosure or open-frame rail using the 10-32 tapped-hole standard. This includes the majority of Middle Atlantic rack products as well as third-party enclosures from manufacturers that follow the EIA-310 rack rail specification with 10-32 threading. Verify your rail thread type before ordering — some enclosures use M6 or 12-24 threading, which require different fasteners. The HPMP is not interchangeable with those standards.

For rack power distribution units, NVRs, network switches, patch panels, and AV receivers that ship without included mounting hardware, or where factory screws have been lost, the HPMP provides a reliable, matched replacement. Keep a pack staged in every service vehicle running Middle Atlantic rack deployments.

What's in the Box

• 50x 10-32 Phillips Truss Head Rack Screws (black, 0.75 in.)

Frequently Asked Questions

Q: What thread standard do the HPMP screws use?

A: The HPMP uses the 10-32 thread pattern, the most common tapped-hole standard for North American commercial rack enclosures. Confirm your rail is 10-32 tapped before ordering — M6 and 12-24 rails require different fasteners.

Q: How long are the screws in the HPMP pack?

A: Each screw is 0.75 inches long, sized for standard 10-32 tapped rack rails without bottoming out or creating interference behind the rail.

Q: What drive type does the HPMP use?

A: Phillips drive, compatible with a standard #2 Phillips bit. No specialty tools required.

Q: How many screws are included in the HPMP?

A: The HPMP master pack includes 50 screws, sufficient to mount 12–16 standard 1U/2U devices with hardware to spare for rework and future expansion.

Q: What head type does the HPMP use and why does it matter?

A: The HPMP uses a truss head profile, which provides a wider bearing surface than a standard pan head. This distributes clamping load across equipment ears more evenly, reducing faceplate distortion on thinner-gauge panels and rack blanks.

Q: Are the HPMP screws compatible with third-party racks?

A: Yes, provided the rack uses 10-32 tapped rails per the EIA-310 standard. Middle Atlantic and most major North American rack enclosure manufacturers default to 10-32, but always verify before ordering.

Jerry Tildsen

The HPMP is one of those SKUs that sounds trivial until you're three hours into a rack build and realize you're four screws short. Middle Atlantic sized this pack at 50 count for a reason — it's enough to outfit a full 12U populated rack and still have spares for panel adjustments or a returned piece of gear. The 10-32 thread on the HPMP is the detail that actually matters at spec time.

Technical Highlights:

• 10-32 x 0.75 in. Sizing: the 0.75-inch length is deliberate — long enough to develop full thread engagement in a standard tapped rail, short enough that it won't protrude and snag cables or rear-mount accessories behind shallow equipment ears.
• Truss Head Geometry: wider bearing diameter than pan head spreads load across thin rack ears without requiring washers — saves a step in high-volume deployments where you're fastening dozens of blanks and shallow-depth panels.
• Black Finish, 50-Count Pack: the finish matters in client-facing head-end rooms; mismatched silver screws on a black rack interior stand out. Stocking the HPMP in black avoids that. Fifty per pack covers a multi-rack security head-end without a reorder mid-job.

Deployment Considerations:

• Confirm your rack rail is 10-32 tapped before pulling from stock — Middle Atlantic enclosures default to 10-32, but some imported or older open-frame rails use M6 or 12-24. The thread pitch is different enough that forcing the wrong fastener will strip the rail.
• The 0.75-inch length is optimized for standard rail thickness. If you're mounting into double-stacked or reinforced rails (sometimes found on seismic-rated enclosures), verify engagement depth — you may need a longer variant.

For a security integrator staging a multi-rack NVR and network head-end, buying the HPMP by the master pack rather than single-sleeve quantities is the practical call — the per-screw cost drops and you won't be short on a Saturday commissioning run.