The Screw,shoulder, cataloged under National Stock Number 5305-01-313-9331, 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 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-313-9331 |
| Primary Part Number | PBF1285-06-399 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 0.563 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN |
| Shoulder Length | 0.305 INCHES MINIMUM AND 0.375 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.141 INCHES MINIMUM AND 0.142 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.188 INCHES MINIMUM AND 0.248 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 | 0.138 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Color | BLACK TOP OF HEAD |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4037 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.223 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 |
|---|---|
| PBF1285-06-399 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC551C-06-399 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BM19069-06-399 | 5/9 Secondary reference U.S. Government activity |
| GS551C06-399 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| BM19069-06-399 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 2R1861-8 | 5/9 Secondary reference Bfgoodrich Co the Aerospace Div Engineered Polymer Products |
| GS551C06-399 | 5/9 Secondary reference Aero Mechanical Fastening Systems Inc |
| 2R1861-8 | 5/9 Secondary reference Aero Mechanical Fastening Systems Inc |
| GS551C06-399 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 5305-01-313-9331 is a Screw,shoulder, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-313-9331 has 2 manufacturer part numbers on file: PBF1285-06-399 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), AIC551C-06-399 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for PBF1285-06-399: Fastener Length: 0.563 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN; Shoulder Length: 0.305 INCHES MINIMUM AND 0.375 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.141 INCHES MINIMUM AND 0.142 INCHES MAXIMUM FIRST SHOULDER 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.