The Screw,close Tolerance, cataloged under National Stock Number 5305-01-086-9288, 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. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-086-9288 |
| Primary Part Number | BACB30AB-P4-9 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Fastener Length | 0.922 INCHES MINIMUM AND 0.954 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.350 INCHES MINIMUM AND 0.402 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81205-BACB30AB MANUFACTURERS STANDARD |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OR STEEL COMP 4037 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.4512 INCHES MINIMUM AND 0.5113 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 |
|---|---|
| BACB30AB-P4-9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30AB-P4-9 | Hi-Shear Corporation (USA) |
| BACB30AB-P4-9 | Federal Manufacturing Corp (USA) |
| BACB30AB-P4-9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30AB-P4-9 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30AB-P4-9 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30AB-P4-9 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| BACB30AB-P4-9 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30AB-P4-9 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BACB30AB-P4-9 | 5/2 Secondary reference U.S. Government activity |
| BACB30AB-P4-9 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30AB-P4-9 | 5/2 Secondary reference U.S. Government activity |
| BACB30AB-P4-9 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| BACB30AB-P4-9 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
NSN 5305-01-086-9288 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-086-9288 has 9 manufacturer part numbers on file: BACB30AB-P4-9 (Sps Technologies, Llc Dba PB Fasteners), BACB30AB-P4-9 (Hi-Shear Corporation), BACB30AB-P4-9 (Federal Manufacturing Corp), BACB30AB-P4-9 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30AB-P4-9 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 4 more.
Key specifications for BACB30AB-P4-9: Surface Finish: 63.0 MICROINCHES GRIP; Fastener Length: 0.922 INCHES MINIMUM AND 0.954 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.350 INCHES MINIMUM AND 0.402 INCHES MAXIMUM IN. 21 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.