# SAM #SPRTA1-27-R-0114

SPECO mechanical transmission/stepover gearbox assembly for B-1 aircraft

**Buyer:** DLA AVIATION AT OKLAHOMA CITY, OK
**Posted:** November 06, 2026
**Respond By:** November 23, 2026
**Identifier:** SPRTA1-27-R-0114
**NAICS:** 336412, 336413, 333613

DLA Aviation at Oklahoma City is sourcing a B-1 aircraft mechanical transmission for the U.S. Air Force.
- Government buyer: Defense Logistics Agency (DLA) Aviation, Oklahoma City; the requirement supports the U.S. Air Force.
- Product: **SPECO Corporation** mechanical transmission/stepover gearbox assembly, part number **NF53301-02A**, NSN **1680011438497RK**.
- Quantity: best estimate **48 each**, with a minimum of **12** and maximum of **72**.
- The assembly is aluminum, weighs 2.3 pounds, and measures 3 × 12 × 8 inches. It transmits and redirects rotating mechanical force from the torque tube.
- The Government does not own the manufacturing data or rights; the procurement is intended for one or a limited number of sources.
- Delivery is required in 2028. No broader period of performance is stated.

### Description

<p>See attached Pre-solicitation Synopsis.</p>

[View original listing](https://sam.gov/opp/3ab598b3a4c04683abf03377fe5ac594/view)