Washer, Flat, from AN970 Rev. 6. Every row below is transcribed from the standard and has its own link.
AN970 at a glance
AN970Engineering drawing · dimensions in inches
Current standard: NASM970. AN970 is now controlled by NASM970 (AN970 Rev. 6 Notice 4). The part numbers do not change: AN970-3 is still the number on drawings, IPCs and bags, and it is the same part. Order it by that number; the current document is NASM970.
Specification
Item
Value
Current standard
NASM970 (part numbers unchanged)
Type
Flat washer
Material
Steel
Locking
None (plain flat washer)
Item
Value
Finish
Cadmium plate, QQ-P-416, Type II, Class 2
Procurement
FF-W-92
Status
Cancelled. Rev. 6 (4 Dec 1984): validated 10 Jun 1994 (Notice 1), inactive for new design 4 Apr 1998 (Notice 2), reactivated 28 Jul 1999 (Notice 3), then cancelled 28 Jul 1999 and superseded by NASM970 with identical part numbers (Notice 4). Standard note: not intended for aircraft use.
Dimensions by size
Dimension, in
No. 10
1/4
5/16
3/8
7/16
1/2
9/16
5/8
A — Hole diameter (ID)
.203
.265
.328
.390
.453
.515
.578
.640
D — Outside diameter
.875
1.125
1.375
1.625
1.812
2.000
2.188
2.375
T — Thickness
.063
.063
.063
.063
.109
.109
.125
.125
Maximum – minimum as tabulated in AN970 Rev. 6; letters as on the standard's drawing.
AN970 Rev. 6, 4 Dec 1984 — Washer, Flat — dimensions, part numbers and notes. Public domain, distribution unlimited. Notices: Notice 1 (10 Jun 1994): validation, Rev. 6 valid for use in acquisition.; Notice 2 (4 Apr 1998): inactive for new design, no longer used except for replacement purposes.; Notice 3 (28 Jul 1999): reactivated, may be used for new or existing design acquisition.; Notice 4 (28 Jul 1999): AN970 Rev. 6 cancelled and superseded by NASM970; part numbers identical and unchanged (AN970-3 = NASM970 AN970-3 as shown in the cross-reference example).
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.
