The Pin-Rivet, cataloged under National Stock Number 5320-01-724-5501, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-724-5501 |
| Primary Part Number | HLT631-8-9 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Lubrication | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| Head Height | 0.0589 INCHES MINIMUM AND 0.0610 INCHES MAXIMUM IN |
| Fastener Length | 0.9475 INCHES MINIMUM AND 0.9675 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | HI-SHEAR SPEC 262 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | AMS 5629 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | FLUSH COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Grip Length | 0.5575 INCHES MINIMUM AND 0.5675 INCHES MAXIMUM IN |
| Width Between Flats | 0.0947 INCHES MINIMUM AND 0.0967 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Shear Strength | 125000 SINGLE POUNDS PER SQUARE INCH |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.3898 INCHES MINIMUM AND 0.3948 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 |
|---|---|
| HLT631-8-9 | Blanc Aero Industries Uk Ltd (GBR) |
| HLT631-8-9 | Huck International, Inc (USA) |
| HLT631-8-9 | West Coast Aerospace, Inc. (USA) |
| HLT631-8-9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT631-8-9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT631-8-9 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HLT631 | D/9 Drawing number reference only Hi-Shear Corporation |
| HLT631-8-9 | 5/2 Secondary reference U.S. Government activity |
NSN 5320-01-724-5501 is a Pin-Rivet, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-724-5501 has 6 manufacturer part numbers on file: HLT631-8-9 (Blanc Aero Industries Uk Ltd), HLT631-8-9 (Huck International, Inc), HLT631-8-9 (West Coast Aerospace, Inc.), HLT631-8-9 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HLT631-8-9 (Sps Technologies, Llc Dba PB Fasteners) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5320-01-724-5502. Verify interchangeability with system specifications before substitution.
Key specifications for HLT631-8-9: Shank Diameter: 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN; Lubrication: CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP; Head Height: 0.0589 INCHES MINIMUM AND 0.0610 INCHES MAXIMUM IN; Fastener Length: 0.9475 INCHES MINIMUM AND 0.9675 INCHES MAXIMUM IN. 20 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.