# DIBBS #SPE4A6-27-T-0268

DLA procurement for 30 source-controlled annular ball bearings and first article testing

**Posted:** October 05, 2026
**Respond By:** October 13, 2026
**Identifier:** SPE4A6-27-T-0268
**NAICS:** 332991

DLA Weapons Support is seeking source-controlled annular ball bearings and a separate first article test for an Air Force critical safety item.
- **Government buyer:** Defense Logistics Agency (DLA), DLA Weapons Support, ASC Commodities Division; the notice identifies Chanee Yarborough.
- **OEMs and approved sources:** **Pratt & Whitney Division**, **United Technologies Corp**, **MPB/Timken**, **MPB Corp**, and **RTX Corporation** are named in the records. The attachment identifies Pratt & Whitney/United Technologies and MPB/Timken as acceptable sources; the initial release also lists MPB Corp and RTX Corporation.
- **Products and quantities:**
  - 30 annular ball bearings, NSN 3110-00-689-7639. Source part numbers include 446563, 328373, and 446563 as cited in the source records; drawing 446563 is proprietary.
  - 1 first article test line item, part number 0001S00000052. The test requires delivery of 3 bearing units within 180 days of contract date.
- **Notable requirements:** The bearing is source-controlled and designated an Air Force critical safety item. Domestic sourcing restrictions apply, and the manufacturer’s quality system must meet SAE AS9100 or an equivalent standard.
- **Delivery:** The 30 bearings have a stated delivery period of 513 days. First article test units are due within 180 days of contract date.

### Description

GOVERNMENT FIRST ARTIC (QTY: Qty - See Solicitation, NSN: 0001S00000052, Purchase Request: 7018392127)
BEARING, BALL, ANNULAR (QTY: 30, NSN: 3110-00-689-7639, Purchase Request: 7018392127)
  Approved Sources:
  - CAGE: 40920, Part No: 328373, Company: MPB CORP
  - CAGE: 52661, Part No: 446563, Company: RTX CORPORATION
  - CAGE: 77445, Part No: 328373, Company: RTX CORPORATION
 

[View original listing](https://www.dibbs.bsm.dla.mil/rfq/rfqrec.aspx?sn=SPE4A627T0268)