12266852

Tank periscope head assembly

12266852 Description

Head, outer; matl: alloy casting 4340, astm A732 grade 10Q, heat treat torc 30 to 36; casting gas tight to 40 psig protective finish: iron phosphate coat per TT-C-490, mthd i, type ii; dia 5 in. lens opening; dia 1.750; housing upper drive; matl: cast al-bronze QQ-C-390, CL954 type i, optional, type ii or type iii; casting meet remits of spec MIL-C-6021, class 4 graded; window round: metric 51.0 dia BEVR=34.62; matl: optical glass, spec MIL-G-174 grb type ks or equiv; support, mirror: matl: alum casting A356.0T6, QQ-A-601; final protective finish: anodize per MIL-A-8625, type ii, class 2, dyed black casting spec MIL-C-6021, class 4; grade d; quality assurance remits 12266908 apply to this dwg .

Features

Head, outer; matl: alloy casting 4340, astm a732 grade 10q, heat treat torc 30 to 36; casting gas tight to 40 psig; protective finish: iron phosphate coat per tt-c-490, mthd i, type ii; dia 5 in.; lens opening; dia 1.750; housing upper drive; matl: cast al-bronze qq-c-390, cl954 type i, optional, type ii or type iii; casting meet rqmts of specification mil-c-6021, class 4 graded; window round: metric 51.0 dia; bevr=34.62; matl: optical glass, spec mil-g-174 grb type ks or equiv; support, mirror: matl: alum casting a356.0t6, qq-a-601; final protective finish: anodize per mil-a-8625, type ii, class 2, dyedblack; casting specification mil-c-6021, class 4; grade d; quality assurance rqmts 12266908 apply to this dwg

Properties of 12266852

NSN:
1240-01-071-2592
Description:
Head Assembly,tank Periscope
Cage Code:

Definition Tank Periscope Head Assembly

The top section of a periscope, tank, consisting of an inclosure which contains one or more mirror(s), and/or prism(s), and a window. It is readily removable to facilitate replacement.

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Last modified 05/08/2024