The Screw,shoulder, cataloged under National Stock Number 5305-01-134-8725, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-134-8725 |
| Primary Part Number | PBF1285-04-179 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 0.344 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN |
| Shoulder Length | 0.113 INCHES MINIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.115 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.174 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | SLOT |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Head Diameter | 0.166 INCHES NOMINAL 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 |
|---|---|
| PBF1285-04-179 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC551C-04-179 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS551C04-179 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| GS551C04-179 | 5/9 Secondary reference Bfgoodrich Co the Aerospace Div Engineered Polymer Products |
| 2R1862-5 | 5/9 Secondary reference Bfgoodrich Co the Aerospace Div Engineered Polymer Products |
| BM19069-04-179 | 5/9 Secondary reference U.S. Government activity |
| BM19069-04-179 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5305-01-134-8725 is a Screw,shoulder, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-134-8725 has 3 manufacturer part numbers on file: PBF1285-04-179 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), AIC551C-04-179 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), GS551C04-179 (Northrop Grumman Systems Corporation).
Key specifications for PBF1285-04-179: Fastener Length: 0.344 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN; Shoulder Length: 0.113 INCHES MINIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.115 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST SHOULDER IN; Thread Length: 0.174 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN. 14 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.