National Item Identification Number

00-172-5983
001725983
6650-00-172-5983
6650001725983

National Stock Number

Item Name

RETAINER,OPTICAL ELEMENT

Federal Supply Class

6650

Description

A cylindrical, externally threaded item having a centrally located hole specifically designed to retain by means of either a raised box (shoulder), or counterbore, countersink, or a similar shaped recess, an optical element such as a lens, reticle, cell, and the like, in optical assemblies. It must have drilled holes or slots to facilitate assembly and disassembly. For items which house the optical element(s), and form the internal or central portions of an optical system, see CELL, OPTICAL ELEMENT. Excludes RING, EXTERNALLY THREADED.

Commercial and Government Entity Code (Supplier Data)

---

30003

---

---

Reference Numbers (Part Numbers)

178AS171

Required Categories

STYLE DESIGNATOR
HOLE DIAMETER
OVERALL LENGTH
THREAD SIZE
III FSC APPLICATIO

Required Description

F1 RECESSED
0.250 INCHES NOMINAL
0.380 INCHES NOMINAL
0.375 IN. -24 UNF 2A
S