The Screw,shoulder, cataloged under National Stock Number 5305-01-143-6536, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-143-6536 |
| Primary Part Number | ST3M653C5-14A |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.082 INCHES MINIMUM AND 0.084 INCHES MAXIMUM IN |
| Fastener Length | 1.390 INCHES MINIMUM AND 1.437 INCHES MAXIMUM IN |
| Shoulder Length | 0.781 INCHES MINIMUM AND 0.803 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.629 INCHES MINIMUM AND 0.634 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ST3M653C5-14A PRIMARY | Hi-Shear Corporation (USA) |
| ST3M653C5-14A | Heartland Precision Fasteners Inc (USA) |
| ST3M653C5-14A PRIMARY | Huck International, Inc (USA) |
| ST3M653C5-14A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M653C5-14A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M653C5-14A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M653C5-14A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M653C5-14A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M653C5-14A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M653C5-14A PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M653C5-14A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M653C5-14A | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M653C5-14A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M653C5-14A | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| ST3M653C5-14A | 5/2 Secondary reference U.S. Government activity |
| ST3M653C5-14A | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M653C5-14A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-143-6536 is a Screw,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-143-6536 has 14 manufacturer part numbers on file: ST3M653C5-14A (Hi-Shear Corporation), ST3M653C5-14A (Heartland Precision Fasteners Inc), ST3M653C5-14A (Huck International, Inc), ST3M653C5-14A (Sps Technologies, Llc Dba PB Fasteners), ST3M653C5-14A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 9 more.
Key specifications for ST3M653C5-14A: Head Height: 0.082 INCHES MINIMUM AND 0.084 INCHES MAXIMUM IN; Fastener Length: 1.390 INCHES MINIMUM AND 1.437 INCHES MAXIMUM IN; Shoulder Length: 0.781 INCHES MINIMUM AND 0.803 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM FIRST SHOULDER IN. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.